Control Method of a Doubly-fed Induction Generator with Grid Synchronization unaffected by encoder position

엔코더 위치에 강인한 계통연계 기능을 갖는 권선형유도발전기 제어 기법

In order to transmit energy generated through the stator winding of a doubly-fed Induct ion generator (DFIG), we need to synchronize the generated voltage vector with the grid voltage vector. However, the existing synchronization method works only when the encoder is installed at a specific Position and equivalent constant is precise. In order to solve this Problem, a new synchronization method has been proposed and a way of applying the method to existing doubly-fed induction generator control algorithm has been also proposed. The validity of the proposed methods have been verified using a prototype converter for the control of a 1.5MW-class doubly-fed induction generator